地震反应谱的快速傅里叶变换和小波变换自动匹配方法对比
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摘要
为研究反应谱图的自动匹配和判比技术,并探讨如何提高自动匹配技术的准确性以及可靠性,设计了基于快速傅里叶变换和小波变换的自动特征提取和匹配方法.通过LABVIEW工具分别将2种方法用于地震反应谱图的分析,比较2种方法的优缺点.经过对大量已有样本的分析实验,可以看出基于小波变换理论的自动特征提取及匹配方法较基于快速傅里叶变换的方法有着更高的局部分辨力,可以清晰地获得奇异点特征值,更有利于谱图匹配和比较.通过本研究丰富了自动解谱领域的理论,促进了自动解谱方法的发展,为今后更深入的研究和应用奠定了基础.
The way to improve the accuracy and reliability of automatic matching and identification technology on seismic response spectra is studied.Accordingly,two different automatic feature extraction and matching methods based on the fast Fourier transform and wavelet transform are presented.By the tool LABVIEW,such two methods are applied to analyze seismic response spectra;and the features of such two methods are compared.Based on the experiments and analysis of amount of samples,it can be concluded that the automatic matching method based on the wavelet transform theory is better than the other method,for the former has a better local resolution.Therefore,the characteristic values of the singular points are more clearly recognized by the method based on the wavelet transform.Through the above-mentioned study,theories of automatic matching are enriched,so as to set a foundation for further studies in future.
引文
[1]李大华,底青云.地震反应谱数值计算方法的研究[J].中国地震,1992,8(1):1-9.
    [2]袁棪.基于MATLAB的地震反应谱计算方法的比较[D].西安:西安建筑科技大学,2012.
    [3]侯春林,李小军,潘蓉,等.AP1000设计地震反应谱在具体厂址评价中的应用[J].原子能科学技术,2013,47(7):1196-1201.
    [4]李恒,冯谦,蔡永建,等.汉口地区长周期设计地震反应谱[J].武汉大学学报(工学版),2011,44(4):492-495.
    [5]曹伟丽.快速傅里叶变换的原理与方法[J].上海电力学院学报,2006,30(1):192-194.
    [6]王海涛,何树延,张征明,等.同时满足反应谱匹配和功率谱密度包络要求的人工时程生成算法[J].核动力工程,2009,30(1):112-115.
    [7]曲贵波,乔爽,张德生.小波分析的应用及其MATLAB程序实现[J].交通科技与经济,2004,(6):39-40,63.
    [8]吕品姬,赵斌,陈志瑶,等.小波分解STFT方法在地形变观测数据中的应用[J].大地测量与地球动力学,2011,31(5):136-140.

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